I saw this, and I'm a fan of Dorman, but yeesh, $25 for what is really a comic book sized floppy? Card stock cover is not hardcover, so this will likely feel like a comic book. Seems more like a tease than a real book to me. This is no reflection on the content, the art looks fantastic! And it's a cool thing to put out, a glimpse behind the scenes. But, as amazing as the art is, the format and the era it covers is not that appealing to me.
But I say jump on it quick if you want it, 250 copies is not very many.